There should be no way to achieve it. You could have strangled him, but you died first because of an accident. You could have strangled him, but because Hitler took a picture with other babies as a souvenir, you were careless and strangled others. You could have strangled him. You found the exact Hitler and watched him stop breathing and return to the future with a smile, but you didn't know that your real Hitler was actually adopted. No one knows about this except his parents, including himself. You are just a point in his fate. You opened Pandora's box.

You can strangle Hitler, and strangle him successfully. For insurance, you slaughter the whole village, return to the future with a smile, take a long breath, and inadvertently find yourself gradually blurred in the mirror and finally disappear. You touched the switch of fate, and a series of chain reactions turned you into a non-existent person, and you were locked in the time from Hitler's birth to the destruction of the village. Look, you can never kill Hitler, because it is a paradox.